Ethan Mollick's new book site was almost entirely built by Opus 5.5
emollick · x · 2026-10-26
Ethan Mollick announced his new book Co-Existence: The Next Phase of AI with a website built almost entirely by Opus 5.5. His previous site, made with Opus 4.8, required heavy manual work to look distinctive; this one, he says, mostly built itself — a rapid leap past generic "ClaudeDesign" aesthetics.
The book centers on the "jagged frontier" concept: AI's capability boundary is wildly irregular rather than a smooth circle, with easy and hard tasks interleaved. It explores how to live and work alongside machines that are sometimes — but not always — smarter than us, covering jobs, companies, schools, and staying in charge of your own thinking.
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